Installed it on my Intel MBP, upgraded my virtual machines to a new format version and now regretting it. The Bootcamp VM does not boot at all and the Win 7 VM is in an infinite restart-repair loop.
recovery,
reset on csr then
reboot delete old boot camp very small link (<100mb) and do a new boot camp vm and
go back to recovery and enable csr
Reboot
Thank God I have backups to revert to.